Why don't they bring back Shane, Dale and Laurie while they're at it? FFS!
Well technically we did see Shane in season 3
and they keep bringing Lori back (unfortunately)
Andrea was an interesting character, but only insofar as they didn't seem to know what to do with her (never read the comics so I don't know what comic Andrea is like). I liked her early on but she increasingly annoyed me. Much as with Lori I wasn't hugely disappointed when she died.